can you offload your program from a board?

I just got a new arduino board and i tried things out, so i was at the blink code and i pressed upload. But now everytime i plug the arduino in my computer its starts blinking. So my question is: Can you offload a program from a arduino uno?

Write an empty sketch to it,

the sketch you have loaded will stay until you either load a blank sketch or load your next sketch. Don't worry that the "blink" code is running, it will still allow you to load a new/updated sketch.